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Update examples to Python 3 in structure section #1093

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Feb 23, 2021
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Update examples to Python 3 in structure section #1093

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8 changes: 4 additions & 4 deletions docs/writing/structure.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -788,7 +788,7 @@ compute x + 1, you have to create another integer and give it a name.

my_list = [1, 2, 3]
my_list[0] = 4
print my_list # [4, 2, 3] <- The same list has changed
print(my_list) # [4, 2, 3] <- The same list has changed

x = 6
x = x + 1 # The new x is another object
Expand Down Expand Up @@ -822,7 +822,7 @@ most idiomatic way to do this.
nums = ""
for n in range(20):
nums += str(n) # slow and inefficient
print nums
print(nums)

**Better**

Expand All @@ -832,15 +832,15 @@ most idiomatic way to do this.
nums = []
for n in range(20):
nums.append(str(n))
print "".join(nums) # much more efficient
print("".join(nums)) # much more efficient

**Best**

.. code-block:: python

# create a concatenated string from 0 to 19 (e.g. "012..1819")
nums = [str(n) for n in range(20)]
print "".join(nums)
print("".join(nums))

One final thing to mention about strings is that using ``join()`` is not always
best. In the instances where you are creating a new string from a pre-determined
Expand Down